Synthesis and mesomorphic properties of cholesteryl p-polyfluoroalkoxy-m-nitrobenzoate

Homologous cholesteryl p-polyfluoroalkoxy-m-nitrobenzoate were synthesized and their phase transition behaviours were studied. Due to the activation of chlorine atom in aromatic ring by introducing o-nitro and p-trifluoromethyl groups, the fluoroalkoxylation can directly be processed using potassium carbonate as base.